JP6251527B2 - Adjustable effective load containment device for wings - Google Patents

Description

  The present disclosure relates generally to a containment device for a wing, and more particularly to an adjustable effective load containment device that remains in place within the wing without being joined or bolted.

  It is often necessary to provide an additional load or an effective load such as an instrumentation device inside the wing. Such an effective load is usually carried in a receiving device mounted inside the wing. For example, in a rotary wing machine, in order to balance the blades, an equilibrium weight can be mounted in a receiving device disposed inside the rotor blade.

  Typically, such containment devices are held in place using fasteners, adhesive joints, or other means that couple such containment devices to the interior of the wing. Various stresses in flight can cause fatigue in the joint or fastener screw. The reduction of these stresses or the elimination of fatigued parts is beneficial for aircraft life and safety.

  In a rotary wing machine, by having the accommodation device as close to the tip as possible and as far from the pitch axis as possible, the effect of static balance correction in the inner and outer chord directions and dynamic balance correction in the front-rear direction can be maximized. it can. Unfortunately, advanced composite rotor blades often use complex tip designs, including lower half angle, upper half angle, receding angle, and taper to improve aerodynamic performance, so they can be accommodated within these features. It may be difficult to dimension the device. In addition, if the containment device is simply moved in the chord direction, there is a risk that the joint and / or fastener will be exposed to high bending stress at an accelerated rate due to the load environment that causes the blade to bend and twist during flight. As a result, it may be more difficult to dimension joints and fasteners.

  Several attempts have been made in the past to solve the problem of how to place the containment device inside the rotor blade. These attempts may have an advantage in some situations, but may not be an advantage in other situations. One such attempt involves moving the containment device further to the inner chord side of the rotor blade. However, by moving the adjustable weight storage device farther from the inner chord side, the tip of the rotor blade, there is a problem with cutting the access panel through the load bearing structure, and the higher rigidity storage device is more flexible. Other difficulties can arise, such as problems with joining or bolting to a sexual structure.

  Other attempts include using a removable tip. However, these can be costly options and can increase the weight of the blade. Another attempt involves co-joining the containment device with the composite rotor blade. However, co-bonded containment devices can constrain pressure applied during curing that can affect laminate quality, can interfere with certain non-destructive inspection techniques, and make positioning control more difficult. There is a fear.

  Therefore, it accommodates inside the wing while avoiding the difficulties associated with joining or bolting a stiffer containment device to a more flexible structure at the wing location subject to relatively high levels of mechanical stress. A solution for mounting the device is needed.

  Accordingly, the present description provides a containment device that does not require joints or associated manufacturing costs and inspections, does not require threaded fasteners, and does not have the associated problems and costs. The shape of the containment device allows the physical force exerted by the rotor during operation to catch the containment device, eliminating the need for joints or fasteners to hold the containment device in place. The assembly of the storage device is also relatively simple. The receiving device is inserted into the opening of the rotor blade and assembled in place in the rotor blade. The containment device can be repeatedly installed and removed for inspection, replacement, repair, or other reasons. While this disclosure generally refers to this disclosure relating to rotary wing aircraft, it should be understood that it can also be used for other structures such as fixed wing aircraft wings.

  The present disclosure has three or four main elements. An upper element inserted into the opening and associated with the inner surface of the rotor blade; a front element and a rear element inserted into the opening and associated with the upper element; and coupled to the front element and the rear element; And a lower element surrounding the cavity. The front and rear elements have flanges that engage the outer periphery of the rotor blade opening. The front and back elements can be joined together or “integrated”. The flange holds the receiving device in the rotor blade. Once assembled, the containment device will not slip out or separate. A split angle exists in the containment device, so that during operation of the rotorcraft, the physical centrifugal force applied to the blades of the rotorcraft acts to further wedge the containment device parts together, thereby The containment device can be held in place without the need for adhesive bonds or fasteners. These split angles are described in more detail below.

  A receiving device comprising a first element having a first flange and an upper element, wherein the first element extends from the inner chord direction to the outer chord direction on the lower surface of the first flange. An upper surface having a first angle with respect to the upper element, the lower element having a second angle with respect to the upper surface of the upper element in a direction extending from the inner chord direction to the outer chord direction, The lower surface is in contact with the upper surface of the first element, the second angle is in a direction opposite to the direction of the first angle, and the first element and the upper element pass through the cavity. A defining storage device is provided herein.

  The present specification also provides a combination device comprising a rotor blade having an opening having an outer peripheral edge and a receiving device inserted into the rotor blade, the receiving device having a first flange. 1 element and an upper element having an upper surface facing the inner surface of the rotor blade, wherein the first element extends in a direction extending from the inner chord direction to the outer chord direction. An upper surface having a first angle with respect to the upper element, the upper element having a lower surface having a second angle with respect to the upper surface of the upper element in a direction extending from the inner chord direction to the outer chord direction; The lower surface is in contact with the upper surface of the first element, the second angle is in a direction opposite to the direction of the first angle, and the first element and the upper element are Contacting, defining a cavity, wherein the first flange is Engaging the peripheral edge.

  The first element can be an integrated front element and rear element with a peripheral flange.

  Alternatively, there may be a second element, and the first element and the second element may be a rear element and a front element, respectively. The first element and the second element can be aligned so that the first flange and the second flange on the second element merge to form an outer peripheral flange. The rear element and the front element may have an upper surface having a first angle with respect to the lower surface of the outer peripheral flange in a direction extending from the inner chord direction to the outer chord direction, and the lower surface of the upper element is the rear element and The upper surface of the front element can be contacted.

  A method of mounting a device in a cavity of a rotor blade, wherein an upper element having an upper surface that mates with an inner surface of the rotor blade is inserted into the cavity, and the upper element is slid in a chord direction to a retracted position. Inserting a first element having a first flange into the cavity, and moving the first element so that the flange contacts an outer peripheral edge of the rotor blade opening. Moving the upper element in the direction of the outer chord to return the upper element from the retracted position, wherein the angled lower surface of the upper element contacts the angled upper surface of the first element And reverting until a cavity is formed by the upper element and the first element.

  The method includes inserting a second element having a second flange into the cavity, wherein the first element and the second element are a rear element and a front element, and the opening Moving the rear element and the front element in a downward direction toward the opening until the outer periphery of the first and second flanges contacts the first flange and the second flange, the first flange and the And a second flange integrally forming an outer peripheral flange. The method also includes integrating the rear element and the front element before the step of moving the rear element and the front element in a downward direction, the first flange and the second flange. To form an outer peripheral flange.

  The method can also include generating an alternative opening for inserting the first element, wherein the first element is an integrated element and the first element has a first flange. Inserting the integrated element into the cavity includes inserting the integrated element through the alternative opening.

  The method can also further include curing an integrated element within the cavity having a combined shape of a front element and a rear element to form the first element.

  Other objects, features and advantages will become apparent when the detailed description of the preferred embodiment is considered in conjunction with the drawings.

1 is a side view of an exemplary rotorcraft employing a containment device that is the subject of this disclosure. FIG. FIG. 4 is a partial perspective view of a rotor blade with a storage device mounted therein. It is an expansion perspective view of the rotor blade with which the accommodating device was mounted therein. It is an expansion perspective view of a rotor blade which shows the accommodation device of the assembled state removed from the blade. FIG. 6 is an exploded view of the storage device. FIG. 6 is a partial side view of a rotor blade with a storage device mounted therein. FIG. 7 is a cross-sectional view along line 7-7 of a rotor blade with a containment device mounted therein. FIG. 9 is a cross-sectional view along line 8-8 of a rotor blade with a containment device mounted therein. It is a figure which shows the sequence of the step which mounts an accommodating apparatus in a rotor blade.

  Reference is now made to the drawings, wherein like elements in different drawings bear the same reference numerals.

  The present disclosure relates to a containment device that can be used, for example, inside a rotor blade of a helicopter or other rotorcraft. Numerous specific details of some embodiments of the containment device are set forth in the following description and in FIGS. 1-9 to allow a thorough understanding of such embodiments. However, one of ordinary skill in the art will appreciate that the present disclosure may have still other embodiments, or that the present disclosure may be practiced without the various details that are described in the following description. For example, while certain embodiments refer to use in a rotorcraft, it should be appreciated that the techniques described can be applied to various vehicles or other cases as desired. The merchant will understand. Furthermore, although it may be mentioned that a storage device is used to receive the additional weight element that adjusts the rotor blade, the storage device is not necessarily used to receive the additional weight element, in fact, It can be used to house other objects such as sensing devices.

  FIG. 1 shows a rotary wing machine 50 having one main rotor with rotor blades 122. In the figure, the location of the exemplary containment device 100 is shown as being near the tip of the rotor blade 122. This exemplary location with respect to the containment device 100 should not be considered limiting. In other embodiments, the storage device 100 can be placed in other positions and orientations as needed. Furthermore, the storage device 100 can be used for a non-rotary wing aircraft.

  FIG. 2 is a partial perspective view of a portion of the rotor blade 122 shown in FIG. 1, in which the receiving device 100 is shown assembled in the rotor blade 122 in an assembled state. FIG. 3 is an enlarged partial view of the same rotor blade 122 and also shows the cross-sectional lines for the cross-sectional views shown in FIGS. Note that the views depicted in FIGS. 2 and 3 are depicted with the bottom surface 130 of the rotor blade 122 facing upward and the top surface 132 of the rotor blade 122 facing downward. Accordingly, the number 173 indicates the direction from the top of the blade 122 toward the bottom of the blade 122.

  As can be seen, a rotor internal cavity 134 is shown. This cavity 134 may be present in a girder structure normally found in rotor blades. An opening 136 having an outer peripheral edge 138 is cut into the rotor blade 122. The outer peripheral edge 138 has a side surface 139 that contacts the outer peripheral flange 110 of the storage device 100. The opening 136 may be in a main structure such as a girder, or may be in another type of structure. The opening 136 is for receiving the storage device 100, and the outer peripheral edge 138 is for holding the storage device 100 via the outer peripheral flange 110 of the storage device 100. The containment device is described in more detail below. FIG. 4 is an enlarged view of FIG. 3, but the storage device 100 is in an assembled state and is removed from the opening 136. FIG. 4 shows a direction 174 that is the outer chord direction.

  FIG. 5 is an illustration of the receiving device 100 in an exploded view and shows all the components of the receiving device 100 shown in FIGS. 6-8 show the storage device 100 mounted in the rotor blade 122 in a side view (FIG. 6) and two cross-sectional views (FIGS. 7-8). The configuration, assembly, and mounting of the containment device 100 will then be described with respect to FIGS.

  The containment device 100 comprises four main components. That is, the upper element 102, the rear element 104, the front element 106, and the lower element 140. As can be seen, the upper element 102 has a digging portion that forms a space 186 for receiving an effective load. Both the front element 106 and the rear element 104 are U-shaped, which serves to form a space for an effective load when the receiving device 100 is in the assembled state. In the assembled state, as seen in FIG. 4, the upper element 102 contacts both the front element 106 and the rear element 104, the front element 106 and the rear element 104 contact the lower element 140, and the lower element 140 is the receiving device. Acts like a 100 cover.

  Both the rear element 104 and the front element 106 have flanges 124, 126. When the rear element 104 and the front element 106 are in the mounted state as shown in FIGS. 6 to 8, the flange 124 and the flange 126 form the outer peripheral flange 110. This peripheral flange 110 serves to hold the containment device 100 in the cavity 134 as will be described in more detail below.

  In the mounted state, the upper surface 114 of the upper element 102 is in contact with the inner surface 112 of the rotor blade 122. The front element 106 and the rear element 104 are in contact with the upper element 102. The outer peripheral flange 110 of the storage device 100 is in contact with the outer peripheral edge 138 of the opening 136. A weight 150 or other effective load is placed in the containment device 100. Finally, the lower element 140 is coupled to the front element 106, the rear element 104, and the upper element 102.

  In the assembled state, the rear element 104 and the front element 106 share an L-shaped boundary line 178, which is best seen in FIG. This boundary line 178 exists because the rear element 104 and the front element 106 are not mirror images of each other. As best seen in FIG. 5, the forward element 106 has a rearward extension 148 that sits on the forward extension 146 of the rearward element 104. This configuration allows the shear pin 156 to be inserted through the shear pin hole 162.

  Note that although the figure shows this L-shaped boundary, other shapes are possible. For example, a configuration in which the rear element 104 has a male extension that fits inside the female portion on the front element 106 is also possible. In such a case, the shear pin 156 can be inserted through both the male extension and the female portion. Further, the rear element 104 and the front element 106 may be mated at a flat vertical interface rather than an L-shaped surface or other type of surface. The shear pin 156 is not absolutely necessary in design, but helps to ensure that the front element 106 and the rear element 104 are properly aligned during insertion into the rotor blade 122.

  Alternatively, the front element 106 and the rear element 104 can be a single integrated element rather than two separate elements. In such a case, the single integrated element is shaped as a combination of the front and rear elements, in other words, the shape when the front and rear elements are permanently attached together. Is done.

  The integrated element can be manufactured and installed in the cavity 134 in a number of different ways. For example, an uncured composite layer configured to form a single integrated element having a shape that combines the front element 106 and the rear element 104 together may be applied during or prior to manufacture of the rotor blade 122. It can be placed in the blade cavity 134 and then cured in the rotor blade 122, thereby producing a single cured integrated element that is free to move within the cavity. All parts required for curing, such as vacuum bags and other parts, can be recovered after curing.

  Alternatively, if access to the interior of the rotor blade 122 is provided in a different manner, such as through an alternative opening at a location such as the rear side of the rotor blade 122, the integrated front / rear element may be replaced with such an alternative. The opening can be passed through and engaged with the outer periphery 138 of the opening 136. The alternative opening can be cut into the wall of the cavity 134, particularly for inserting the integrated element into the cavity 134. Alternatively, alternate openings may exist for some other purpose. After placing the integrated element into the cavity 134 through the alternative opening, the alternative opening can be closed.

  The various parts can be held together using fasteners, shear pins, or other methods. In the illustrated example of the receiving device 100, a shear pin 156 is inserted through the front element 106, the rear element 104, and the shear pin hole 162 of the upper element 102. The lower element 140 is held in place using a front element 106, a rear element 104, an upper element 102, and a fastener 154 inserted through a fastener hole 164 in the lower element 140. Weight 150 is held in place by using weight 150 and hex bolt 152 inserted through hex bolt hole 166 in upper element 102. Although this particular combination of fasteners has been described and illustrated, other combinations or configurations of fasteners or holding devices may be used. For example, an adhesive can be used in place of the fastener.

  If a single integrated element is used, the shear pin can still be used to align the integrated element with the upper element 102.

  A reinforcing liner 144 may be present around the outer perimeter 138 to assist in receiving forces exerted on and / or applied by the containment device 100. The liner 144 is not secured to the containment device 100 but is used to line the outer periphery 138 of the opening 136 of the rotor blade 122. The liner 144 may be a plurality of elements made from composite materials, metal materials, or other suitable materials. The dimensions of the main elements of the storage device 100 are such that the upper surface 114 and the outer peripheral flange 110 are held tightly between the outer peripheral edge 138 and the inner surface 112 when the storage device 100 is mounted. Therefore, the storage device 100 is securely held in place by the upper surface 114 of the upper element 102 and the outer peripheral flange 110 of the storage device 100.

  In prior art embodiments, the effective load storage device is usually held in place by the use of adhesives, fasteners, or by simultaneous curing, or by a combination of such methods. No such holding method or device is used in the containment device 100 that is the subject of this disclosure. Instead, the unique shape of the components of the storage device 100 causes the storage device 100 to be held in place by the force that is naturally applied to the storage device 100 when the rotor blade 122 is operating, and the vibration of the storage device 100 Or the movement with respect to the rotor blade 122 is prevented.

  Various parts of the containment device 100 have angled surfaces that cooperate to achieve this retention function. Specifically, both the front element 106 and the rear element 104 have a split angle 160 that allows the front element 106 and the rear element 104 to be thicker at one end than at the other end. This split angle 160 is simply reflected in that the lower surface 168 of the flanges 124, 126 is angled with respect to the upper surface 170 of the front element 106 and the rear element 104. Further, the upper element 102 has a split angle 158 that faces away from the split angle 160 of the front element 106 and the rear element 104. The split angle 158 of the upper element 102 is directly reflected in that the upper surface 114 of the upper element 102 is angled with respect to the lower surface 172 of the upper element 102.

  The split angles 160, 158 help hold the containment device 100 in place and resist the movement of the components of the containment device 100 relative to each other and to other parts of the rotor 122. Useful. These split angles do this using physical forces on the operating rotor 122, which are centrifugal forces. Centrifugal force is applied to all parts of the storage device 100 in the outer string direction 174. This naturally includes the front element 106, the rear element 104, and the upper element 102. Centrifugal force acting on the front element 106 and the rear element 104 in the chord direction causes the rim 176 of the front element 106 and the rear element 104 to contact the outer periphery 138 (or liner 144 if present), which Prevents both rear elements 104 from moving further in the chord direction. Due to the centrifugal force on the upper element 102, the split angles 158, 160 cause the upper element 102 to act like a wedge and prevent further movement in the chord direction.

  Although the split angles 158 and 160 are shown to be complementary with the upper element 102 and the front element 106 and rear element 104, it should be understood that the split angles 158 and 160 may be configured differently. Please note that. For example, the split angle 160 may be zero or may be different from that shown in FIG. However, it should be understood that the split angle 158 should be such that the centrifugal force applied to the containment device 100 makes the upper element 102 a wedge relative to other parts of the containment device (the front element 106 and the rear element 104). . The split angles 158 and 160 are reflected in the angle between certain surfaces (eg, the upper surface 114 and the lower surface 172), but the split angles 158 and 160 are necessary functions to wedge the upper element 102 in place by centrifugal force. It should also be understood that any face-to-face can be achieved. It should also be understood that the internal shape of the blade 122 can have an angled surface and can contribute to the required amount of angle appearing at the split angles 158 and 160.

  The wedge insertion of the upper element 102 also pushes the front element 106 and the rear element 104 in the downward direction 173, which presses the flange 110 against the outer periphery 138 (or liner 144, if present), and the front and rear elements 104, 106 prevents the rotor blade 122 from slipping out and prevents the front and rear elements 104, 106 from falling into the rotor blade 122. Accordingly, the split angles 158, 160 and other shapes of the components of the containment device 100 allow the rotor to be used without having to use fasteners, adhesives, or structures such as simultaneous curing bonding of the rotor blade 122 and the containment device 100. It can be seen that the storage device 100 is reliably held in place when 122 is in a rotating state. It should be noted that although fasteners may be used within the containment device 100, benefits may still be obtained by avoiding the use of fasteners that couple the containment device 100 to the rotor blade 122. The split angles 158, 160 also function to prevent parts of the containment device 100 from being thrown out of the blade during flight if the shear pin 156 is damaged.

  The design of the containment device 100 is such that a load path that is robust against the forces acting on the containment device during normal operation of the rotor is achieved. Such forces include upward and downward forces caused by the up and down movement of the rotor blade 122, outer chord forces caused by centrifugal forces, and forward and backward forces caused by movement of the rotor blades 122.

  The movement of the rotor blade 122 in the downward direction creates a force that is applied to the upper surface 114 of the upper element 102 by the inner surface 112 of the rotor blade 122. This force is generally applied across the upper surface 114 of the upper element 102 by a corresponding region of the inner surface 112 of the rotor blade 122. There are no small or weak components that are exposed to these forces. The movement of the rotor blade 122 in the upward direction creates a force that is applied to the flange 110 by the circumferential edge 138 (via the liner 144 if present). The flange 110 is supported by a reinforcing region 180 (fillet) around the entire periphery of the flange. Note that although a fillet is shown, gussets can be used, as well as other mechanisms that provide a reinforcing function. The force applied to the rim 176 forward and backward is received by the rim 176 and the outer peripheral edge 138 along the peripheral edge of the rim 176 and the outer peripheral edge 138. The reinforcement liner 144 serves to receive a force applied to the outer peripheral edge 138. The curvature of the rim 176 helps to distribute the force by not having a corner where the force concentrates. Note that the rim 176 has a curved shape, but other shapes are possible, such as a square or rectangle, or a square with a slightly rounded edge, or other shapes.

  It is advantageous if an effective load, such as the additional weight element 150, has a peripheral wall 182 that fits snugly into a compartment 184 formed in the containment device 100 so that the peripheral wall 182 abuts the wall of the compartment 184. The force applied by the effective load can be applied to the wall of the compartment.

  FIG. 9 is an illustration of the sequence of steps for assembling the containment device 100 within the cavity 134 of the rotor blade 122. It should be understood that this is an exemplary method, and that other methods are possible that are consistent with the teachings provided herein. This method assumes that the liner 144 is already attached to the rotor blade 122. In step 500, the upper element 102 is inserted through the opening 136 and lies against the inner surface 112 of the rotor blade 122. To make room for other components, the upper element 102 is preferably pushed in the chord direction. At step 502, the front element 106 and the rear element 104 are placed in the rotor internal cavity 134. The front element 106 and the rear element 104 can be oriented with their corresponding flanges 124, 126 facing away from each other so that the front element 106 and the rear element 104 can be easily integrated. preferable.

  In step 504, the front element 106 and the rear element 104 are merged so that their corresponding mating surfaces, ie, the rear element mating surface 120 and the front element mating surface 118 on the front element 106, are aligned. Thereby assembling the front element 106 and the rear element 104 within the rotor cavity 134 so that the outer peripheral flange 110 is formed by two corresponding flange surfaces 124 and 126. Pins, clips, or other temporary fastening means can be used to hold the front element 106 and the rear element 104 in place for subsequent steps. Alternatively, the front element 106 may be first placed in the cavity 134 and engaged with the outer periphery 138, and then the rear element 104 may be inserted in the cavity 134 and engaged with the front element 106 and the outer periphery 138. .

  In step 506, the front element 106 and the rear element 104 are moved toward the opening 136 such that the outer peripheral flange 110 contacts the outer peripheral edge 138 of the opening 136. In step 508, the upper element 102 is returned from its inner chord position and brought into contact with the front element 106 and the rear element 104. A recovery device can be used to grip the upper element 102, thereby bringing the upper element into place. The upper element 102 is slid in the chord direction, thereby bringing the upper surface 170 of the front element 106 and the rear element 104 into contact with the lower surface 172 of the upper element 102. The upper element 102 is slid until it is properly aligned with the front element 106 and the rear element 104.

  In step 510, a shear pin 156 is inserted through the shear pin hole 162 to align the front element 106, the rear element 104, and the upper element 102. In step 512, an effective load such as a weight 150 is inserted into the receiving device 100, and a fastener such as a hexagon bolt 152 is inserted into the hexagon bolt hole 166 to fix the weight 150 in place.

  Finally, the lower element 140 is engaged with the front element 106 and the rear element 104, and the fastener 154 is inserted through the hole 164 to secure the entire storage device 100 in the assembled state. The storage device 100 was assembled here.

  The containment device 100 can be removed from the interior of the rotor blade 122 by a procedure reverse to that disclosed above with respect to FIG. Remove fastener 154. The lower element 140 is removed from the other receiving device 100. Remove the hexagon bolt. Remove weight 150. Remove the shear pin 156. The upper element 102 is slid in the chord direction to disengage the upper element from the front element 106 and the rear element 104. After complete disengagement, the front element 106 and the rear element 104 are pushed into the rotor cavity 134 so that they can be separated from each other. The front element 106 and the rear element 104 are removed from the rotor cavity 134 through the opening 136. Finally, the upper element 102 is removed through the opening 136.

  Thus, it can be seen that the storage device 100 can be easily attached and detached while the storage device 100 is securely held in place while the rotor blade 122 is in operation.

  In any of the foregoing embodiments, additional structures or support elements can be used as needed. For example, a liquid shim layer can be used to fill the remaining space. Furthermore, further reinforcing layers similar to the liner 144 can be mounted at various positions.

  Although the present disclosure has been described with reference to various embodiments, various modifications can be made to the elements of these embodiments without departing from the scope of the present disclosure, and equivalents can be substituted. Those skilled in the art will appreciate that this is possible. In addition, many modifications may be made to the teachings of the disclosure to adapt to a particular situation without departing from the essential scope of the disclosure. Accordingly, the present disclosure is not limited to the specific embodiments disclosed herein as a reference for practicing the methods of this disclosure, and the present disclosure is not limited to the arrangements included in the appended claims, It includes a modified form or a combined form.

  According to an aspect of the present disclosure, there is provided a combination device including a rotor blade having an opening having an outer peripheral edge and a storage device inserted into the rotor blade, and the storage device has a first flange. A first element and an upper element having an upper surface facing the inner surface of the rotor blade, wherein the first element extends in a direction extending from the inner chord direction to the outer chord direction. A top surface having a first angle with respect to the bottom surface, the upper element having a bottom surface having a second angle with respect to the top surface of the upper element in a direction extending from the inner chord direction to the outer chord direction The lower surface is in contact with the upper surface of the first element, the second angle is in a direction opposite to the direction of the first angle, and the first element and the upper element Contacting, defining a cavity, said first flange Engaging the outer peripheral edge.

  Advantageously, the first element is an integrated front element and rear element, and the first flange is an outer flange. The combination device further comprises a second element having a second flange, wherein the first element is a front element, the second element is a rear element, the first flange and the second element A flange is substantially aligned to define an outer flange.

  Advantageously, the rear element and the front element have an upper surface having a first angle with respect to the lower surface of the outer peripheral flange in a direction extending from the inner chord direction to the outer chord direction, the lower surface of the upper element being , Contacting the upper surface of the rear element and the front element.

  Advantageously, the combination device may further comprise a lower element coupled to the first element and surrounding the cavity, further comprising an effective load inserted into the cavity. In addition, the combination apparatus may include the first flange that reinforces the first flange by forming a reinforcing region on the upper side of the first flange. Advantageously, the rear element and the front element are U-shaped in order to form a space for an effective load.

  Advantageously, the method of mounting the device in the cavity of the rotor blade inserts an upper element with an upper surface that mates with the inner surface of the rotor blade into the cavity and moves the upper element in the chord direction to a retracted position. Sliding the first element having a first flange into the cavity and moving the first element so that the flange contacts the outer periphery of the rotor blade opening. And returning the upper element from the retracted position by moving the upper element in the direction of the outer chord, wherein the angled lower surface of the upper element is the angled upper surface of the first element And reverting until a cavity is formed by the upper element and the first element. The method may further include positioning a liner along the outer periphery of the rotor blade opening.

DESCRIPTION OF SYMBOLS 50 Rotary wing machine 100 Accommodating apparatus 102 Upper element 104 Rear element 106 Front element 110 Outer peripheral flange 112 Inner surface 114 Upper surface 118 Front element facing surface 120 Rear element facing surface 122 Rotor blade 124 Flange 126 Flange 130 Bottom surface 132 Upper surface 134 Cavity 136 Opening 138 Outer rim 139 Side 140 Lower element 144 Reinforcement liner 146 Front extension 148 Back extension 150 Weight 152 Hexagon bolt 154 Fastener 156 Shear pin 158 Split angle 160 Split angle 162 Shear pin hole 164 Fastener hole 166 Lower face of hexagon bolt 170 Upper surface 172 Lower surface 173 Downward direction 174 Outer chord direction 176 Rim 178 Boundary line 180 Reinforcement region 182 Peripheral wall 184 Compartment 186 Space

Claims (15)

A first element having a first flange;
A storage device comprising an upper element,
The first element has an upper surface having a first angle with respect to a lower surface of the first flange in a direction extending from an inner chord direction to an outer chord direction;
The upper element has a lower surface having a second angle with respect to the upper surface of the upper element in a direction extending from the inner chord direction to the outer chord direction, and the lower surface contacts the upper surface of the first element The second angle is in a direction opposite to the direction of the first angle;
The first element and the upper element define a cavity;
Containment device. The first element is a combination of a front element and a rear element;
The first flange is an outer peripheral flange;
The storage device according to claim 1. A second element having a second flange;
The first element is a front element and the second element is a rear element;
The first flange and the second flange are substantially aligned to define an outer peripheral flange;
The storage device according to claim 1 . The rear element and the front element have an upper surface having a first angle with respect to a lower surface of the outer peripheral flange in a direction extending from the inner chord direction to the outer chord direction;
The lower surface of the upper element contacts the upper surface of the rear element and the front element;
The accommodation device according to claim 3. The receiving device according to claim 3, further comprising a lower element coupled to the rear element and the front element and surrounding the cavity. Further comprising an effective load inserted into the cavity;
The accommodation device according to any one of claims 1 to 5. The first flange and the second flange reinforce the outer peripheral flange by forming a reinforcing region above the first flange and the second flange.
The storage device according to any one of claims 3 to 5. The rear element and the front element are U-shaped to provide space for an effective load;
The accommodation device according to any one of claims 3, 4, 5, and 7. The upper element has a digging portion that forms a space for receiving an effective load;
The accommodation device according to any one of claims 1 to 8. A method for mounting a device in a cavity of a rotor blade, comprising:
Inserting an upper element having an upper surface facing the inner surface of the rotor blade into the cavity and sliding the upper element in a chord direction to a retracted position;
Inserting a first element having a first flange into the cavity;
Moving the first element such that the flange contacts an outer periphery of the rotor blade opening;
Returning the upper element from the retracted position by moving the upper element in a chord direction, wherein the angled lower surface of the upper element contacts the angled upper surface of the first element; Reverting until a cavity is formed by the upper element and the first element. The upper element and the first element are inserted through the opening;
The method of claim 10. Inserting a second element having a second flange into the cavity, wherein the first element and the second element are a front element and a rear element;
Moving the rear element and the front element in a downward direction toward the opening until the outer peripheral edge of the opening contacts the first flange and the second flange, wherein The method of claim 11, further comprising: integrating a flange and the second flange to form an outer peripheral flange. Before the step of moving the rear element and the front element in the downward direction, the rear element and the front element are integrated, and the first flange and the second flange are aligned to form an outer peripheral flange. Form,
The method of claim 12. Generating an alternative opening for inserting the first element;
The first element is a combination of a front element and a rear element;
Inserting a first element having a first flange into the cavity comprises inserting the integrated element through the replacement opening and closing the replacement opening;
The method of claim 10 . The method of claim 14 , further comprising curing an integrated element in the cavity that is a combination of an anterior element and a posterior element to form the first element.

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